Hi, Regarding to your question, it is more suitable for Office 365 support forum. I would like to provide you their link: http://community.office365.com/en-us/f/default.aspx Thanks.Rowen TechNet Community Support

Do you mean to say OWA? Cause to use Lync from Outlook, user has to be logged into Lync client.Gulab Prasad, MCITP: Exchange Server 2010 | MCITP: Exchange Server 2007 MCITP: Lync Server 2010 | MCITP: Windows Server 2008 My Blog | Z-Hire Employee Provisioning App Skype: Exchange.Ranger

Hi, Regarding to your question, it is more suitable for Office 365 support forum. I would like to provide you their link: http://community.office365.com/en-us/f/default.aspx Thanks.Rowen TechNet Community Support

We have on premises exchange 2010 and now we are using Microsoft Office 365 Lync online so we want that our lync will be communicate with our exchange 2010 (configured mailbox) so whenever our user login in outlook so it has an option of lync to chat with others. Is it possible to work?swagh@techgyan.com